This project is the largest study to date to investigate the long-term relationships between bariatric surgery and durable improvements in body weight, hypertension, and renal disease, as well as its association with major operative complications and long-term survival. These outcomes will be compared to a population-based cohort of severely obese patients who have not had weight loss surgery and investigate demographic and clinical characteristics (e.g., age, gender, race/ethnicity, bariatric procedure type, T2D severity, and other comorbid medical and mental health conditions and their treatments) that may be associated with beneficial and adverse outcomes of surgery. This study continues with manuscript completion.